It is possible to override a property in a nested prefab and save it, without applying the property to the original prefab when you click apply.
Follow these steps to override a new property in a nested prefab:
- Add a Prefab Overrides component to the nested prefab in which you want to override a property.
- In the Prefab Overrides component, click the 'Add Override' button.
- Choose the property to override.
- Apply the changes to the prefab using the Apply button in the inspector.
If you need to quickly override multiple properties then you can navigate to the 'Modified Properties' tab in the 'Add Override' popup. In this tab, you can quickly select all or some of the modified properties in the prefab.